[Boost-commit] svn:boost r45790 - trunk/boost/iostreams

From: technews_at_[hidden]
Date: 2008-05-26 16:15:19

Author: turkanis
Date: 2008-05-26 16:15:18 EDT (Mon, 26 May 2008)
New Revision: 45790
URL: http://svn.boost.org/trac/boost/changeset/45790

Log:
added static assert to fix issue #1580
Text files modified: 
   trunk/boost/iostreams/chain.hpp |     4 ++++                                    
   1 files changed, 4 insertions(+), 0 deletions(-)

Modified: trunk/boost/iostreams/chain.hpp
==============================================================================
--- trunk/boost/iostreams/chain.hpp	(original)
+++ trunk/boost/iostreams/chain.hpp	2008-05-26 16:15:18 EDT (Mon, 26 May 2008)
@@ -140,6 +140,10 @@
     chain_base(const chain_base& rhs): pimpl_(rhs.pimpl_) { }
 public:
 
+    // dual_use is a pseudo-mode to facilitate filter writing, 
+    // not a genuine mode.
+    BOOST_STATIC_ASSERT((!is_convertible<mode, dual_use>::value));
+
     //----------Buffer sizing-------------------------------------------------//
 
     // Sets the size of the buffer created for the devices to be added to this